Physical and mechanical properties of Ta2O5 doped zirconia-toughened alumina (ZTA) composites

Naga, S. M.; Hassan, Adel Mahmood; Awaad, M.

doi:10.1016/j.ceramint.2015.01.039

Cited by 42 publications

(14 citation statements)

References 34 publications

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“…6), indicates that increasing the content of dopant (Ta 2 O 5 ) enhances the apparent density. It may be assumed that small ionic radius (0.7Å) of dopant Ta is responsible for acceleration of densification process, as it is well known that the smaller the ionic radius of dopant the better the densification rate [11]. An enormous rise in apparent density was observed when Ta 2 O 5 dopant increased to 3 mol%, Ta3 glass-ceramic showed superior density among others, indicating the reduction of pores and diffusion of particles along the grain boundaries.…”

Section: Physical Propertiesmentioning

confidence: 89%

“…Previously a number of studies have been made on doped glass-ceramics with * E-mail: madeehariaz2762@yahoo.com different nucleating agents, such as TiO 2 [9,10], to obtain effective crystallization and sinterability of the glass-ceramics. Naga et al [11] reported that doping of Ta 2 O 5 improved densification, hardness and toughness of pure alumina. It was stated that mechanical strength can be enhanced with addition of Ta 2 O 5 to bioactive material 45S5Bioglass®, the most extensively studied material that has both osteoconductive and osteoproductive abilities, so that it may be used for high load bearing applications [12].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Ta₂O₅doping on mechanical and biological properties of silicate glass-ceramics

Riaz

Zia

Saleemi³

et al. 2016

Materials Science-Poland

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The mechanical properties of silicate glass-ceramics were evaluated based on the compressive strength tests. It was found that Ta 2 O 5 addition improved densification, refinement of the microstructure and toughening of the bodies. The maximum compressive strength of the bodies with 1 mol% Ta 2 O 5 was increased 3-fold (245.92 ±0.3 MPa) in comparison to undoped glass-ceramics which was measured to be 89.04 ±0.3 MPa, while for 3 mol% it became 4-fold (387.12 ±0.4 MPa) greater. The addition of Ta 2 O 5 stabilized the system by controlling the biodegradation of the glass-ceramics. It effectively depressed the apatite formation as by addition of 3 mol% Ta 2 O 5 no apatite layer was observed. It may be concluded from this study that mechanical and physical properties can be improved by the addition of Ta 2 O 5 , but at a cost of bioactivity. Still the optimized composition having Ta 2 O 5 1 mol% may provide appropriate strength of biomaterials for high load bearing applications.

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Section: Physical Propertiesmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Influence of Ta₂O₅doping on mechanical and biological properties of silicate glass-ceramics

Riaz

Zia

Saleemi³

et al. 2016

Materials Science-Poland

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“…Owing to the better tensile strength of tantalum, 5 wt% of Ta 2 O 5 was added along with varying wt% of Bi 2 O 3 into epoxy matrix. [30] The composites were prepared up to 35 wt% of filler concentration. With further filler loading, the films were brittle owing to the phase separation between the matrix and the filler phase.…”

Section: Preparation Of the Compositesmentioning

confidence: 99%

Attenuation properties of epoxy‐Ta₂O₅ and epoxy‐Ta₂O₅‐Bi₂O₃ composites at γ‐ray energies 59.54 and 662 keV

Muthamma

Bubbly

Gudennavar

2020

J of Applied Polymer Sci

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Epoxy resin filled with suitable high Z elements can be a potential shield for X‐rays and γ‐rays. In this work, we present the γ‐ray attenuation properties of epoxy composites filled with (0–30 wt%) Tantalum pentoxide (Ta2O5) and Ta2O5‐Bi2O3, which were prepared by open mold cast technique. X‐ray diffraction patterns showed crystalline peaks of Ta2O5 and bismuth oxide (Bi2O3) in the prepared epoxy‐Ta2O5 and epoxy‐Ta2O5‐Bi2O3 composites. Homogeneity of the samples at higher filler wt% was revealed by SEM images. Mechanical characterization showed the enhanced mechanical strength of epoxy‐Ta2O5‐Bi2O3 composites compared to epoxy‐Ta2O5. Higher storage modulus and glass transition temperature of the epoxy‐Ta2O5‐Bi2O3 composites showed enhanced stiffness and thermal stability when compared to neat and epoxy‐Ta2O5. Decrease in the value of tan(δ) at higher content of filler loadings indicated the good adhesion between filler and matrix. Mass attenuation coefficients of epoxy‐Ta2O5 (30 wt%) composites at γ‐ray energies 59.54 and 662 keV were found to be 0.876 cm2 g–1 and 0.084 cm2 g–1, while that of epoxy‐Ta2O5‐Bi2O3 (30 wt% Bi2O3) composite were 1.271 cm2 g–1 and 0.088 cm2 g–1, respectively. The epoxy‐5% Ta2O5‐30% Bi2O3 composites with higher μ/ρ value and tensile strength may be a potential γ‐ray shield in various radiation environments.

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“…Recent reports envisage the use of Ce 4+ , Ti 4+ , Ta 5+ , SiO 2 , Dy 3+ , and Gd 3+ as stabilizers in ZTA systems . The combination of improved fracture toughness and better resistance to phase degradation is determined by CeO 2 inclusions in ZTA systems …”

Section: Introductionmentioning

confidence: 99%

Structural, optical tuning, and mechanical behavior of zirconia toughened alumina through europium substitutions

Ponnilavan

Kannan

2018

J Biomed Mater Res

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The structural and optical features of zirconia toughened alumina (ZTA) due to the assorted range of Eu 3+ substitutions are demonstrated. The characterization studies affirm the pivotal role of Eu 3+ on the improved structural stability of ZTA and associated tetragonal zirconia (t-ZrO 2 ) ! cubic zirconia (c-ZrO 2 ) transformation. Eu 3+ prefers accommodation at the lattice sites of ZrO 2 and their gradual accumulation induces t-! c-ZrO 2 transition. Beyond the substitution limit, Eu 3+ reacts with Al 2 O 3 to form EuAlO 3 . Optical studies validate typical Eu 3+ emissions, and further, the emission spectrum also predicts the symmetry of Eu 3+ coordination at the ZrO 2 lattice. Uniform distribution of ZrO 2 and Al 2 O 3 grains throughout the microstructures are evident from the morphological analysis. Further, the influence of Eu 3+ on the enhanced mechanical stability of ZTA is ensured from indentation technique.

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Physical and mechanical properties of Ta2O5 doped zirconia-toughened alumina (ZTA) composites

Cited by 42 publications

References 34 publications

Influence of Ta₂O₅doping on mechanical and biological properties of silicate glass-ceramics

Influence of Ta₂O₅doping on mechanical and biological properties of silicate glass-ceramics

Attenuation properties of epoxy‐Ta₂O₅ and epoxy‐Ta₂O₅‐Bi₂O₃ composites at γ‐ray energies 59.54 and 662 keV

Structural, optical tuning, and mechanical behavior of zirconia toughened alumina through europium substitutions

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Physical and mechanical properties of Ta2O5 doped zirconia-toughened alumina (ZTA) composites

Cited by 42 publications

References 34 publications

Influence of Ta2O5doping on mechanical and biological properties of silicate glass-ceramics

Influence of Ta2O5doping on mechanical and biological properties of silicate glass-ceramics

Attenuation properties of epoxy‐Ta2O5 and epoxy‐Ta2O5‐Bi2O3 composites at γ‐ray energies 59.54 and 662 keV

Structural, optical tuning, and mechanical behavior of zirconia toughened alumina through europium substitutions

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Influence of Ta₂O₅doping on mechanical and biological properties of silicate glass-ceramics

Influence of Ta₂O₅doping on mechanical and biological properties of silicate glass-ceramics

Attenuation properties of epoxy‐Ta₂O₅ and epoxy‐Ta₂O₅‐Bi₂O₃ composites at γ‐ray energies 59.54 and 662 keV